The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mgqFp9Dhy

Height: 2203
Hash: 7ac3d873ffd870df6f0a4f0c0fb898f0ec1f2d9c48bd7ab03b3f1ed3099a69d4
Previous block: 5a4ee98c19d66e0dbc6cf98ec43c4f168c9de631aa6e9b18ffac2a100bea15f9
Next block: 4f52ad1e5134930179528684b4886c01ea2b126ce3af1b7bae237d2b25913e50
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1728964804
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: c3b885b3fb672f8111a9e2f2e776d44b405927fc28ebc4b8e5d6401fcf48508f
Median time: 1728964803
Difficulty: 4.656542373906925e-10
Confirmations: 41
Chainwork: 0000000000000000000000000000000000000000000000000000000000001138
Bits: 207fffff